P.I. Blues (2003)

An exotic pet store manager, whose a bumbling 'wanna-be' private eye, masquerades as a real private detective to help the poster pinup beauty, "Miss Power Tool", find her missing brother. Comedy ensues as they try to outwit Russian gangsters, the police and other strange characters. Although the movie takes place in the present, it's reminiscent of the studio detective movies of the 1940's.